Re: [R] How to sort TWO columns ?

From: TEMPL Matthias <Matthias.Templ_at_statistik.gv.at>
Date: Wed 21 Jul 2004 - 17:03:07 EST


Hi,

It would be discussed yesterday.

See e.g. in Google for ("sorting a data frame" R) http://www.r-project.org/nocvs/mail/r-help/2002/0088.html Or one entry yesterday:

Best,
Matthias

>Hi

>Lets assign your data frame to the variable yourdf
>then:

>yourdf[ , order( yourdf$year ) ]

>should sort it.

>For decreasing increasing sorting
>see
>?order

>Sincerely Eryk.

>*********** REPLY SEPARATOR ***********

>On 20.07.2004 at 09:51 Luis Rideau Cruz wrote:

>Hi all
>
>I have the next data frame
>
> year STOD SLAGNR TAL TALT TALVEKT
>1 2002 2120006 57 1 NA 1
>2 1997 97030032 57 NA NA NA
>3 1997 97030071 27 1 NA NA
>4 1997 97030005 57 1 NA NA
>5 1997 97020127 60 NA 1 NA
>6 2001 1160025 27 1 NA 1
>7 1998 98020069 60 1 NA NA
>8 1996 96030009 57 NA 1 NA
>
>How to sort it according to "year" column
>Sort does seem to work only on vectors
>
>Thank you
>
>Luis Ridao Cruz
>Fiskirannsóknarstovan
>Nóatún 1
>P.O. Box 3051
>FR-110 Tórshavn
>Faroe Islands
>Phone: +298 353900
>Phone(direct): +298 353912
>Mobile: +298 580800
>Fax: +298 353901
>E-mail: luisr@frs.fo
>Web: www.frs.fo
>

>
> Dear ALL,
>
> I fear my question has already been answered many times
> before, but I haven't fund that in archives...
>
> I am working on spatial datasets and, in most arrays I'm
> handling, there are two columns dedicated to (x,y)-coords.
> For different reasons - notably to draw image() plots, I need
> to have these two columns sorted in increasing order. But

> sort() and order() seem to apply to vectors - or one single
> column - only.
>

> Could somedy please let me know how to sort two columns of a

> dataframe, with priority to one of them, just like in access ?
>
> Thanks,
>
> Jacques VESLOT
> CIRAD
>

>
Another related question :
> How to put legend on image() plots - or image-based plots like

>
image.kriging() in geoR ?
> Despite help pages, I haven't succeeded.
>
>
>
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